It still get back to the old Grams per,/watt/ month
2000 grams , 1000 watt bulb, 2 months = 0.5 grams
That is a standard of groth, note the best I have seen in .6 by Tic in a sea of green.
I am a lazy grower and get .468 , in a 3 phase system, clone, pre grow, bloom. on a 63 day cycle. Bucket system flood and drain, eco grow , eco bloom,
Automated my relayrunner automation system, mh lights. Note plants are grown in granit or hydorcorn. Look at my gallery for any pictures.